Fundamentals of Cyber Security

Abstract Cybersecurity has become a foundational competence for modern computing professionals because digital systems now underpin education, commerce, governance, and everyday life. This book introduces cybersecurity as a structured discipline centered on protecting assets and managing risk, not merely as a set of tools or isolated “hacking” techniques. The text builds progressively from core terminology and security goals to threat landscapes, defensive controls, operating system and endpoint security, authentication and access control, malware fundamentals, cloud and container security basics, network security concepts, cryptographic foundations, web and application security, data security, security testing and reporting, and finally security operations and incident response. Throughout, emphasis is placed on responsible practice, conceptual clarity, and a defensible mapping between threats, vulnerabilities, controls, and verification. Keywords: asset, threat, vulnerability, risk, CIA triad, attack surface, security controls, IAM, malware, incident response, logging, cryptography, web security, data protection, governance.